Y 0.08Sr 0.92Fe xTi 1-xO 3-δ perovskite for solid oxide fuel cell anodes

Jong Seol Yoon; Mi Young Yoon; Chan Kwak; Hee Jung Park; Sang Mok Lee; Kyu Hyoung Lee; Hae Jin Hwang

doi:10.1016/j.mseb.2011.10.016

Y _0.08Sr _0.92Fe _xTi _1-xO _3-δ perovskite for solid oxide fuel cell anodes

Jong Seol Yoon, Mi Young Yoon, Chan Kwak, Hee Jung Park, Sang Mok Lee, Kyu Hyoung Lee, Hae Jin Hwang

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

A single phase perovskite Y _0.08Sr _0.92Fe _xTi _1-xO _3-δ (x = 0.05, 0.1,0 0.20, 0.25, 0.40, and 0.50) was fabricated at 1400 °C in air by a solid state reaction method and its electrical conductivity and electrochemical properties as an anode were investigated as a function of the Fe content. Doping with Y for Sr allowed the SrFe _xTi _1-xO _3-δ perovskite to be stable at 800 °C in a reducing atmosphere. At 900 °C, metallic Fe precipitated and the stability of the perovskite phase under a reducing atmosphere decreased as the Fe content increased. The conductivity of Y _0.08Sr _0.92Fe _xTi _1-xO _3-δ (x = 0.40) was greater than that of the x = 0.20 sample. The conductivity of Y _0.08Sr _0.92Fe _xTi _1-xO _3-δ was found to be 2 × 10 ^-1 Scm ^-1 at 800 °C in H ₂. Sintering the Y _0.08Sr _0.92Fe _xTi _1-xO _3-δ anode at 1200 °C was found to be optimum to obtain not only good interfacial adhesion, but also a fine grain structure. The Y _0.08Sr _0.92Fe _0.25Ti _0.75O _3-δ anode exhibited the lowest polarization resistance (0.7 and 1.8 Ωcm ² at 800 and 700 °C).

Original language	English
Pages (from-to)	151-156
Number of pages	6
Journal	Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume	177
Issue number	2
DOIs	https://doi.org/10.1016/j.mseb.2011.10.016
Publication status	Published - 2012 Feb 15

Bibliographical note

Funding Information:
This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea. Part of this work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No.2010-0010744).

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.mseb.2011.10.016

Cite this

@article{ef14a96ceae145e3b17bfe978d6299b3,

title = "Y 0.08Sr 0.92Fe xTi 1-xO 3-δ perovskite for solid oxide fuel cell anodes",

abstract = "A single phase perovskite Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.05, 0.1,0 0.20, 0.25, 0.40, and 0.50) was fabricated at 1400 °C in air by a solid state reaction method and its electrical conductivity and electrochemical properties as an anode were investigated as a function of the Fe content. Doping with Y for Sr allowed the SrFe xTi 1-xO 3-δ perovskite to be stable at 800 °C in a reducing atmosphere. At 900 °C, metallic Fe precipitated and the stability of the perovskite phase under a reducing atmosphere decreased as the Fe content increased. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.40) was greater than that of the x = 0.20 sample. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ was found to be 2 × 10 -1 Scm -1 at 800 °C in H 2. Sintering the Y 0.08Sr 0.92Fe xTi 1-xO 3-δ anode at 1200 °C was found to be optimum to obtain not only good interfacial adhesion, but also a fine grain structure. The Y 0.08Sr 0.92Fe 0.25Ti 0.75O 3-δ anode exhibited the lowest polarization resistance (0.7 and 1.8 Ωcm 2 at 800 and 700 °C).",

author = "Yoon, {Jong Seol} and Yoon, {Mi Young} and Chan Kwak and Park, {Hee Jung} and Lee, {Sang Mok} and Lee, {Kyu Hyoung} and Hwang, {Hae Jin}",

note = "Funding Information: This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea. Part of this work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No.2010-0010744).",

year = "2012",

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doi = "10.1016/j.mseb.2011.10.016",

language = "English",

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journal = "Materials Science and Engineering B: Solid-State Materials for Advanced Technology",

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T1 - Y 0.08Sr 0.92Fe xTi 1-xO 3-δ perovskite for solid oxide fuel cell anodes

AU - Yoon, Jong Seol

AU - Yoon, Mi Young

AU - Kwak, Chan

AU - Park, Hee Jung

AU - Lee, Sang Mok

AU - Lee, Kyu Hyoung

AU - Hwang, Hae Jin

N1 - Funding Information: This research was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, Republic of Korea. Part of this work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No.2010-0010744).

PY - 2012/2/15

Y1 - 2012/2/15

N2 - A single phase perovskite Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.05, 0.1,0 0.20, 0.25, 0.40, and 0.50) was fabricated at 1400 °C in air by a solid state reaction method and its electrical conductivity and electrochemical properties as an anode were investigated as a function of the Fe content. Doping with Y for Sr allowed the SrFe xTi 1-xO 3-δ perovskite to be stable at 800 °C in a reducing atmosphere. At 900 °C, metallic Fe precipitated and the stability of the perovskite phase under a reducing atmosphere decreased as the Fe content increased. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.40) was greater than that of the x = 0.20 sample. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ was found to be 2 × 10 -1 Scm -1 at 800 °C in H 2. Sintering the Y 0.08Sr 0.92Fe xTi 1-xO 3-δ anode at 1200 °C was found to be optimum to obtain not only good interfacial adhesion, but also a fine grain structure. The Y 0.08Sr 0.92Fe 0.25Ti 0.75O 3-δ anode exhibited the lowest polarization resistance (0.7 and 1.8 Ωcm 2 at 800 and 700 °C).

AB - A single phase perovskite Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.05, 0.1,0 0.20, 0.25, 0.40, and 0.50) was fabricated at 1400 °C in air by a solid state reaction method and its electrical conductivity and electrochemical properties as an anode were investigated as a function of the Fe content. Doping with Y for Sr allowed the SrFe xTi 1-xO 3-δ perovskite to be stable at 800 °C in a reducing atmosphere. At 900 °C, metallic Fe precipitated and the stability of the perovskite phase under a reducing atmosphere decreased as the Fe content increased. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ (x = 0.40) was greater than that of the x = 0.20 sample. The conductivity of Y 0.08Sr 0.92Fe xTi 1-xO 3-δ was found to be 2 × 10 -1 Scm -1 at 800 °C in H 2. Sintering the Y 0.08Sr 0.92Fe xTi 1-xO 3-δ anode at 1200 °C was found to be optimum to obtain not only good interfacial adhesion, but also a fine grain structure. The Y 0.08Sr 0.92Fe 0.25Ti 0.75O 3-δ anode exhibited the lowest polarization resistance (0.7 and 1.8 Ωcm 2 at 800 and 700 °C).

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VL - 177

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EP - 156

JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology

SN - 0921-5107

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